Browsing Fen Fakültesi by Publisher "Pergamon-Elsevier Science Ltd"
Now showing items 1-20 of 25
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A Note on the Homotopy Analysis Method
(Pergamon-Elsevier Science Ltd, 2010)The present work is devoted to using an analytic approach, namely the homotopy analysis method, to obtain convergent series solutions of strongly nonlinear problems. On the basis of the homotopy derivative concept described ... -
A Novel Traveling Wave Solution for Ostrovsky Equation Using Exp-Function Method
(Pergamon-Elsevier Science Ltd, 2009)In this paper, we predict a new traveling wave solution of Ostrovsky equation by using He's Exp-function method. The method is straightforward and concise and its application shows an imminent prospective for the nonlinear ... -
A Strong Global Attractor for the 3D Wave Equation with Displacement Dependent Damping
(Pergamon-Elsevier Science Ltd, 2010)We prove that if the displacement coefficient of the damping of the 3D wave equation is a positive constant on the interval (-l, l), for large enough l > 0, then this equation has a strong global attractor in H(0)(1)(Omega) ... -
A Subclass of Analytic-Functions Defined By Using Certain Operators of Fractional Calculus
(Pergamon-Elsevier Science Ltd, 1995)Making use of certain operators of fractional calculus, we introduce a new class F-delta(n,lambda,alpha) of functions which are analytic in the open unit disk mu and obtain a necessary and sufficient condition for a function ... -
An Analytic Shooting-Like Approach For The Solution of Nonlinear Boundary Value Problems
(Pergamon-Elsevier Science Ltd, 2011)In this paper a novel approach is presented for an analytic approximate solution of nonlinear differential equations with boundary conditions. By converting the nonlinear problem into an initial value form, a shooting-like ... -
An Asymptotic Investigation Into The Stabilization Effect Of Suction In The Rotating-Disk Boundary Layer Flow
(Pergamon-Elsevier Science Ltd, 2007)The suction effects in the three-dimensional boundary layer flow due to a rotating disk are analyzed from the linear stability point of view making use of the asymptotic structure of the suction mean velocity profiles of ... -
An Optimal Variational Iteration Method
(Pergamon-Elsevier Science Ltd, 2011)The variational iteration method is studied in the present work. The classical variational iteration method is improved and extended by introducing a new concept of a convergence accelerating parameter. A rigorous approach ... -
Asymptotic Behaviour of a Class of Nonlinear Functional Differential Equations of Third Order
(Pergamon-Elsevier Science Ltd, 2001)This paper deals with nonoscillatory behaviour of solutions of third-order nonlinear functional differential equations of the form y''' + p(t)y' + q(t)F(y(g(t))) = 0. It has been shown that under certain conditions on ... -
Asymptotic Calculation of Inviscidly Absolutely Unstable Modes of the Compressible Boundary Layer on a Rotating Disk
(Pergamon-Elsevier Science Ltd, 2006)In this work a long-wavelength asymptotic approach is used to analyze the region of absolute instability in the compressible rotating disk boundary layer flow. Theoretically determined values of branch points for the ... -
Blow-Up of Solutions to Quasilinear Parabolic Equations
(Pergamon-Elsevier Science Ltd, 1999)Sufficient conditions for global nonexistence (blow up) of solutions of the initial-boundary value problem for a class of second-order quasilinear parabolic equations: [GRAPHICS] are established. (C) 1999 Elsevier Science ... -
Defining The K(Th) Powers Of The Dirac-Delta Distribution For Negative Integers
(Pergamon-Elsevier Science Ltd, 2001)In [1], Koh and Kuan defined the powers of the Dirac-delta distribution for positive integers. Here we extend their definition for negative integers. Also, we give meaning to the distribution delta (-kappa)(+). (C) 2001 ... -
Existence Of A Global Attractor For The Plate Equation With A Critical Exponent In An Unbounded Domain
(Pergamon-Elsevier Science Ltd, 2005)In this work, we study the asymptotic behavior of solutions for the plate equation with a critical exponent in R-n. We prove the existence of a global attractor in W-2(2)(R-n) x L-2(R-n). (c) 2005 Elsevier Ltd. All rights ... -
Finite-Dimensional Attractors For A General Class Of Nonautonomous Wave Equations
(Pergamon-Elsevier Science Ltd, 2000)Our aim in this note is to construct attractors and exponential attractors for a general class of nonautonomous semilinear wave equations. Following the approach described in [1], we define a semigroup S(t) associated to ... -
Forecasting Nonlinear Time Series With A Hybrid Methodology
(Pergamon-Elsevier Science Ltd, 2009)In recent years, artificial neural networks (ANNs) have been used for forecasting in time series in the literature. Although it is possible to model both linear and nonlinear structures in time series by using ANNs, they ... -
Fractional Calculus And Certain Starlike Functions With Negative Coefficients
(Pergamon-Elsevier Science Ltd, 1995)A certain subclass T(n,p,lambda,alpha) of starlike functions in the unit disk is introduced. The object of the present paper is to derive several interesting properties of functions belonging to the class T(n,p,lambda,alpha). ... -
Global Attractor For The One Dimensional Wave Equation With Displacement Dependent Damping
(Pergamon-Elsevier Science Ltd, 2012)We study the long-time behavior of solutions of the one dimensional wave equation with nonlinear damping coefficient. We prove that if the damping coefficient function is strictly positive near the origin then this equation ... -
Improvement In Estimating The Population Mean In Simple Random Sampling
(Pergamon-Elsevier Science Ltd, 2006)This paper proposes some estimators for the population mean using the ratio estimators presented in [C. Kadilar, H. Cingi, Ratio estimators in simple random sampling, Applied Mathematics and Computation 151 (2004) 893-902] ... -
Interval Criteria for Oscillation of Second-Order Functional Differential Equations
(Pergamon-Elsevier Science Ltd, 2005)By using averaging functions, new interval oscillation criteria are established for the second-order functional differential equation, (r (t) vertical bar x' (t)vertical bar(alpha-1) x' (t))' + F (t, x (t), x (tau (t)), ... -
Neighborhoods Of A Class Of Analytic Functions With Negative Coefficients
(Pergamon-Elsevier Science Ltd, 2000)By making use of the familiar concept of neighborhoods of analytic functions, the authors prove several inclusion relations associated with the (n, delta)-neighborhoods of various subclasses of starlike and convex functions ... -
On Partial Derivatives Of The Incomplete Beta Function
(Pergamon-Elsevier Science Ltd, 2008)The incomplete beta function B(x) (a, b) is defined for a, b > 0 and 0 < x < 1 and its definition was extended to negative integer values of a and b in [E. Ozcag, I. Ege, H. Gurcay, An extension of the incomplete beta ...